关键词: 交通工程, 信号交叉口, 左转待转区, 释放过程模型, 通行能力分析

Abstract:

The departure processes model is formulated for left-turn lanes on waiting area, depending on the theory of traffic wave. The model adopts cumulative curve which is based on arrival rate, departure rate and spreading rate of starting wave. According to this model, the max queue length, the minimum green time, the optimum green time and the maximum red time of left-turn phase can be determined. On the condition that channelization and signal timing method of intersection are invariable, the increment of vehicle released per cycle can be calculated through the departure processes model, moreover, the increment of left-turn lanes capacity. The result can also be used as an academic reference for optimizing signal control parameters.

Key words: traffic engineering, signalized intersection, left-turn waiting zone, departure processes model, capacity of left-turn lane